Valve device.



. Patented Jan. 2|, I902.- A. J. MURPHY.

VALVE DEVICE.

(Application filed May 29, 190:

(No Model.)

WITNESSES? W ATTORNEYS UNTTED STATES PATENT GFFTCE.

ANDRE\V JOlIN MURPHY, OF NEW YORK, N.

VALVE DEVICE.

SPECIFICATION formingpart of Letters Patent No. 691,477, dated January21, 1902.

Application filed May 29, 1901. Serial No. 62|337- (No model.

To to whom it may concern.-

Be it known that I, ANDREW JOHNMURPHY,

a citizen of the United States, and'a resident of New York, county ofNew York, and State of New York, have invented certain new and usefulImprovements in Valve Devices, of which the following is aspecification, reference being had to the accompanying drawings, forminga part thereof, in which similar characters of reference indicatecorresponding parts.

This invention relates to an improved valve device embodying ascrew-threaded valvestem and a revoluble detachable disk valve, theobject thereof being to provide an article of this character which is soconstructed as to admit of readily detaching the disk valve from thestem for the purpose of repairing or renewingits seat portion, but whichembodies novel features of construction adapted to prevent buckling ofthe valve, which is common to the removable valve devices now in use.

The device is simple in construction, durable, and operative, and by itsuse the expense of maintaining the valve in continuous eifective workingcondition is reduced to a minimum.

The invention will be hereinafter fully described, and specifically setforth in the annexed claims.

' In the accompanying drawings, forming part of this specification,Figure 1 is a perspective view of my improved device in its preferredform, showing the several parts disassembled; Fig. 2, a perspective viewshowing the parts assembled; Fig. 3, a plan view of the valve,illustrating a slight modification; Fig. 4, a cross-sectional elevationtaken on a line a: 00 of Fig. 3; Fig. 5, a side elevation, partly insection, showing the device in connection with a globe-valve casing;Fig. 6, a perspective View illustrating the lower part of thevalve-stem; Fig. 7, a plan view of a key or fastener to connect theparts of the device, and Fig. 8 is aplan viewillustrating aslightlymodified disk valve.

In the practice of my invention in its preferred form I employ,primarily, a metallic disk A, having a cylindrical head B formedintegral therewith and extended upwardly and centrally therefrom. Formedcentrally within the upper surface of the disk A is a diameter thereof,is a slot 1.

circular recess a, which communicates with the inner periphery of thecylindrical headB and is of a diameter equal thereto. Leading throughthe side of the head B, above this said recess and preferablyof a Widthequal to the Formed in the upper surface of the cylindrical head B,parallel with the slot 1, is a recess having its side walls 2 extendedtangentially from a semicircular shoulder 3, which is concentric withthe recess a and of a diameter equal to the diameter of the valve-stemO, as shown by Fig. 3 of the drawings, or the side walls, as 2 Fig. 8 ofthe drawings, may extend from the segmental shoulder 3, the distancebetween said side walls being equal to the diameter of the stem 0 at itsgrooved part c. The walls and shoulder of this said recess engage aportion of the valve-stem C when the parts are assembled, as will behereinafter described. Formed on the lower end of the valve-stem C is anannular flange 4, of a thickness equal to the depth of the recess a andof the same diameter as said recess. Above this flange is an annulargroove 0. The stem 0 also has a conical collar 5 formed thereon, whosebase is equal in diameter to the diameter of the cylindrical head B. Asa means for connecting the parts a malleable metal fasteningplate D isemployed. This said plate has a recess d therein to fit partly aroundthe groove 0 of the valve-stem O to lock the said stem to the disk valveA. Cut through the plate D near its outer edge is a tongue 6, which isadapted to be bent downwardly into an aperture '7, formed in the uppersurface of the valve A.

In assembling the parts the flanged lower end of the valve-stem C ismoved laterally within the slot 1 until it assumes a position concentricwith the inner diameter of the cylindrical head B, when it is allowed todrop, whereby the flange 4 will fill the recess a and the valve 5 willcover the entire upper surface of the said head B. The fastening-plate Dis then placed within the slot 1 of the head B and over the flange 4 ofthe valve-stem C .and having its recess d in engagement with the annulargroove 4, thus clamping the said stem between the recess of thecylindrical head and the recess of the fastening-plate, which plate isthen effectually secured by bending the tongue 6 within the recess 7 ofthe cylindrical head B, as clearly shown by Fig. 5 of the drawings.

To disassemble the parts, the tongue 6 can be again bent into normalshape by forcing a thin instrument against its under surface, thusallowing the fastening-plate D to be readily removed.

In the modification illustrated by Figs. 3 and 4 the slot 1 is extendeddiametrically through the head B. To fasten the head of the valve to thestem in this case, I may use a malleable key or plate D, having theelongated prongs d thereon, to pass through the slot 1. This key issecured in place by bending the free ends of the prongs d over on theouter periphery of the head B after said key has been passed through theslot 1.

The disk valves A are each preferably supplied with an annular recess 8,having grooves 10 within each annular wall thereof. These recessescontain a filling 11 of a suitable compressed composition of matteradapted to act as a good valve-seat.

In use the device is employed in connection with a globe-valve casing E,having a conical seat f formed in its removable head F, through whichthe stem 0 is threaded, an annular valve-seat 6 being supplied forengaging the disk valve A.

The operations of the device are obvious, Fig. 5 of the drawingsillustrating the relative arrangement thereof with the globe valvestructure, the screw-stem O engaging the head F, and the seating-surfaceof the disk valve A bearing upon the annular valveseat e, showing thedisk valve closed. When the valve is opened, the conical collar or valve5 engages the seat f to prevent escape of steam around the valve-stem.

I do not claim, broadly, the use of a revoluble and detachable valve ona screw-stem, as I am aware that structures embodying these generalfeatures are not new; but my device has advantages over other structuresknown to me inasmuch as all the parts thereof fit snugly together whenthey are assembled, thus providing a valve and stem which arepractically integral to withstand pressure and obviate buckling, butwhich revolve freely in relation to each other .to facilitate theoperation of the device.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. As a valve device, the combination,with a screw-stem having a conicalcollar, an annular groove and an annular flange on its lower end, of avalve having a circular recess in its upper surface to fit the said annu-lar flange and a cylindrical extension having a slot leadingthrough'the base thereof and a recess in the top wall thereof, and a keywithin said slot and having a bifurcated end part engaging the saidannular groove of the valvestem whereby the valve may rotate on thestem, but lateral or vertical movement of the parts relatively with eachother is prevented, substantially as shown and described.

2. As a valve device, the combination, with the screw-stem having theconical collar, annular groove and flange on its inner end, of the diskvalve having the recess a and the concavity 7, in its upper surface andthe cylindrical extension B, formed integral therewith and having a slotextended through its base and a recess through its head, and a malleablemetal key embodying a plate having a bifurcated inner end to engage thesaid annular groove of the stem and a tongue to engage the saidconcavity 7, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 23d day of May, 1901.

ANDREW JOHN MURPHY.

Witnesses:

SOPHIA HARNISCH, BELLE PATERSON.

